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Difference between a mole and a atom

AbdalAziz

2

What is the difference between a mole and a atom?

Also, How many atoms are there present in 16g of Oxygen?

Thanks

Reply 1

sonofdot

8

Think of eggs. If an atom is like an egg, then a mole is like a dozen eggs - except instead of there being 12 "eggs" in the "dozen", there are

Unparseable latex formula:

6.02 \times 10^{23

Reply 2

emilyyy

1

sonofadot has got it exactly right, OP :smile:

A mole is just an exact quantity of atoms. The quantity of atoms (6.02x10^23) is too much of a mouthful to say every time, so we just refer to it as "a mole".

Reply 3

Andylol

14

sonofdot

Think of eggs. If an atom is like an egg, then a mole is like a dozen eggs - except instead of there being 12 "eggs" in the "dozen", there are

Unparseable latex formula:

6.02 \times 10^{23

^

Reply 4

Annaconda

17

AbdalAziz

What is the difference between a mole and a atom?

Also, How many atoms are there present in 16g of Oxygen?

Thanks

the different is that atom has "an" before it, mole has "a"

but yeah, what they said, an atom is one, a mole is more than one atom (6 x 10^23)

Reply 5

dsch

13

a factor of 6000000000000000000000000

Reply 6

BJack

19

A mole isn't necessarily a quantity of atoms; it's just a number of things. So a mole of nitrogen monoxide comprises about 6 x 10^23 molecules of NO.

Reply 7

emilyyy

1

BJack

A mole isn't necessarily a quantity of atoms; it's just a number of things. So a mole of nitrogen monoxide comprises about 6 x 10^23 molecules of NO.

And to go with the original analogy a dozen doesn't have to be eggs. Could be a dozen potatoes or a dozen apples.

It's all about defining an specific quantity, OP, without having to say the very large number every time.

Reply 8

AbdalAziz

OP

2

Thanks for the replies,

So working out how many moles and atoms there are in 16g of Oxygen i got:

16/16 = 1 mole

16/1 = 16 atoms

Is this correct?

AbdalAziz

Thanks for the replies,

So working out how many moles and atoms there are in 16g of Oxygen i got:

16/16 = 1 mole

16/1 = 16 atoms

Is this correct?

1 mole in 16g of oxygen. Relative formula/atomic mass, then put grams on the end. I think.

Reply 11

sonofdot

8

AbdalAziz

Thanks for the replies,

So working out how many moles and atoms there are in 16g of Oxygen i got:

16/16 = 1 mole

16/1 = 16 atoms

Is this correct?

Edit: Firstly, read BJack's post below. Then, if you escape the infinite loop:

Since my analogy clearly didn't work, my only option is to push it further...

If you have a dozen eggs, how many eggs do you have? 12

If you have a mole of oxygen molecules, how many molecules do you have?

6.02 \times 10^{23}

Reply 12

BJack

19

AbdalAziz

Is this correct?

Firstly, remember that oxygen is a diatomic molecule. Secondly, read sonofdot's post.

Reply 13

AbdalAziz

OP

2

sonofdot

Edit: Firstly, read BJack's post below. Then, if you escape the infinite loop:

Since my analogy clearly didn't work, my only option is to push it further...

If you have a dozen eggs, how many eggs do you have? 12

If you have a mole of oxygen molecules, how many molecules do you have?

6.02 \times 10^{23}

1 *

6.02 \times 10^{23}

= number of molecules?

please explain how I work out the number of atoms.

Reply 14

AbdalAziz

OP

2

I know the formula to work out moles is

number of moles = Mass in grams/Mass of 1 mole in g

So 16grams/16amu = 1mole.....right?

Reply 15

BJack

19

AbdalAziz

1 *

6.02 \times 10^{23}

= number of molecules?

That's right(-ish). Since oxygen is diatomic, 16g of it will only be half a mole, so 3.01 x 10^23 molecules of

O_2

.

Please explain how I work out the number of atoms.

How many atoms are there in a molecule?
How many molecules do you have?

Reply 16

scott8anthony

1

sonofdot

Edit: Firstly, read BJack's post below. Then, if you escape the infinite loop:

Since my analogy clearly didn't work, my only option is to push it further...

If you have a dozen eggs, how many eggs do you have? 12

If you have a mole of oxygen molecules, how many molecules do you have?